Kind of weird that they say it’s exact when even the representative image has fork/join points in the rings. Are we to believe that only one part of the tree aged for a few years now and then? Darn temporal anomalies growing on trees…
Within a particular core, the lines can be calibrated (set to a known base point) by radiocarbon dating, comparing to known marker events such as a fire, and also integrating records across trees to create stitched meta-records. Doing so they can also start to estimate the “instrumental” error of the tree itself, since trees can just stop growth entirely sometimes.
Kind of weird that they say it’s exact when even the representative image has fork/join points in the rings. Are we to believe that only one part of the tree aged for a few years now and then? Darn temporal anomalies growing on trees…
Within a particular core, the lines can be calibrated (set to a known base point) by radiocarbon dating, comparing to known marker events such as a fire, and also integrating records across trees to create stitched meta-records. Doing so they can also start to estimate the “instrumental” error of the tree itself, since trees can just stop growth entirely sometimes.